#!/usr/bin/env python
# Copyright 2016-2018 CERN for the benefit of the ATLAS collaboration.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Authors:
# - Cedric Serfon, <cedric.serfon@cern.ch>, 2016
# - Vincent Garonne, <vgaronne@gmail.com>, 2018
# - Dimitrios Christidis, <dimitrios.christidis@cern.ch>, 2018-2019
#
# PY3K COMPATIBLE

'''
Atropos Daemon : End the life of the rules according to the Lifetime Model
'''

import argparse
import signal

from rucio.daemons.atropos.atropos import run, stop


def get_parser():
    """
    Returns the argparse parser.
    """
    parser = argparse.ArgumentParser()
    parser.add_argument("--run-once", action="store_true", default=False, help='Runs one loop iteration')
    parser.add_argument("--dry-run", action="store_true", default=False, help='Dry run mode')
    parser.add_argument("--threads", action="store", default=1, type=int, help='Concurrency control: number of threads')
    parser.add_argument("--bulk", action="store", default=1000, type=int, help='Bulk control: number of requests per cycle')
    parser.add_argument("--grace-period", action="store", default=86400, type=int, help='Grace period for the rules. In seconds !!!')
    parser.add_argument("--date-check", action="store", help='Date when the lifetime model will be applied. Cannot be used for a date in the future if dry-run is not enabled')
    parser.add_argument("--unlock-rules", action="store_true", default=False, help='Automatically unlock affected rules')
    parser.add_argument("--spread-period", action="store", default=0, type=int, help='Set the rules to randomly expire over a period (in seconds). Uses a uniform distribution')
    parser.add_argument("--purge-replicas", action="store_true", default=False, help='Set the replicas to be deleted instead of secondarised')
    return parser


if __name__ == "__main__":

    # Bind our callback to the SIGTERM signal and run the daemon:
    signal.signal(signal.SIGTERM, stop)

    parser = get_parser()
    args = parser.parse_args()
    try:
        run(threads=args.threads, bulk=args.bulk, date_check=args.date_check,
            dry_run=args.dry_run, grace_period=args.grace_period,
            once=args.run_once, unlock=args.unlock_rules,
            spread_period=args.spread_period,
            purge_replicas=args.purge_replicas)
    except KeyboardInterrupt:
        stop()
